Collaborative Research: Laminated Lake Sediments from the Canadian High Arctic: Understanding the Climatic Signal for Paleoclimatic Reconstruction

题目：加拿大高北极地区层状湖泊沉积物：理解古气候重建概要的气候信号。高北极地区的冰芯和其他古气候记录表明，夏季气温在过去500年里达到了整个全新世的最低水平，但在过去100年里发生了戏剧性的逆转。该奖项隶属于北极湖泊和河口古气候（PALE）项目，旨在研究来自多个地点的湖泊沉积物，以确定该假设是否得到沉积记录的支持。为了更好地理解沉积物中的古气候信号，我们计划进行一项为期三年的基于过程的研究，以确定高纬北极高盐分生湖泊索菲亚湖沉积物通量和不同沉积物形成的主要控制因素。索菲亚湖提供了一个简单的地形环境，这将有助于隔离原始气候强迫的努力。为了将冰帽冰芯的古气候记录与冰川边缘的沉积记录联系起来，还将恢复阿加西斯冰盖边缘湖泊的沉积物。

Abstract ATM-9322768 Retelle, Michael J. Bates College Title: Laminated Lake Sediments from the Canadian High Arctic: Understanding the Climatic Signal for Paleoclimatic Reconstruction Synopsis. Ice core and other paleoclimatic records from the High Arctic suggest that summer temperatures reached minimum levels for the entire Holocene during the last 500 years, but underwent a dramatic reversal in the last 100 years. This award, under the Paleoclimate from Arctic Lakes and Estuaries (PALE) program is designed to study lake sediments from a number of sites to determine if this hypothesis is supported by the sedimentary record. To better understand the paleoclimatic signal in the sediments, a three year process-based study is planned to determine the primary controls on sediments flux and varved sediment formation in Sophia Lake, a High Arctic hypersaline, meromictic lake. Sophia Lake provides a simple topographic environment, which will facilitate efforts to isolate the primary climatic forcing. Sediments from lakes on the margin of Agassiz Ice Cap will also be recovered in order to link the paleoclimatic record of ice cores from the ice cap to sedimentary records from the glacier margin,